Writing Apache Modules with Perl and C, by
Lincoln Stein and Doug MacEachern (O'Reilly).
Selected chapters available online at https://www.modperl.com/.
mod_perl Developer's Cookbook,
by Geoffrey Young, Paul Lindner, and Randy Kobes (Sams Publishing).
Selected chapters and code examples available online at https://www.modperlcookbook.org/.
This page is an explanation of how to use the Meta
HTML tag to prevent caching, by browser or proxy, of an individual
page wherein the page in question has data that may be of a sensitive
nature (as in a "form page for
submittal") and the creator of the page wants to
make sure that the page does not get submitted twice.